<template>
  <div id="app">
    <a-input @change="handleInputChange" :value="inputValue" placeholder="请输入任务" class="my_ipt" />
    <a-button @click="addItemToList" type="primary">添加事项</a-button>

    <a-list bordered :dataSource="infoList" class="dt_list">
      <a-list-item slot="renderItem" slot-scope="item">
        <!-- 复选框 -->
        <a-checkbox @change="(e) =>{statusChange(e,item.id)}" :checked="item.done">{{item.info}}</a-checkbox>
        <!-- 删除链接 -->
        <a slot="actions" @click="removeItemById(item.id)">删除</a>
      </a-list-item>

      <!-- footer区域 -->
      <div slot="footer" class="footer">
        <!-- 未完成的任务个数 -->
        <span>{{unfinishedLength}}条剩余</span>
        <!-- 操作按钮 -->
        <a-button-group>
          <a-button @click="changeList('all')" :type="viewKey === 'all' ? 'primary' : 'default'">全部</a-button>
          <a-button @click="changeList('unfinished')" :type="viewKey === 'unfinished' ? 'primary' : 'default'">未完成</a-button>
          <a-button @click="changeList('finished')" :type="viewKey === 'finished' ? 'primary' : 'default'">已完成</a-button>
        </a-button-group>
        <!-- 把已经完成的任务清空 -->
        <a @click="clean">清除已完成</a>
      </div>
    </a-list>
  </div>
</template>

<script>
  import {mapState,mapGetters} from 'vuex'

  export default {
    name: 'app',
    created(){
      this.$store.dispatch('getList');
    },
    data() {
      return {

      }
    },
    methods:{
      handleInputChange(e){
        this.$store.commit('setInputValue',e.target.value);
      },
      // 向列表中新增item项
      addItemToList(){
        if(this.inputValue.trim().length<=0){
          return this.$message.warning('文本框内容不能为空');
        }

        this.$store.commit('addItem')
      },
      // 根据id 删除对应的任务事项
      removeItemById(id){
        this.$store.commit('removeItem',id);
      },
      // 复选框状态变化的事件
      statusChange(e,id){
        //  通过 e.target.checked 可以监听到复选框状态
        const param = {
          id:id,
          status:e.target.checked,
        };
        this.$store.commit('changeStatus',param);
      },
      // 清除已完成的任务
      clean(){
        this.$store.commit('cleanFinished');
      },
      // 修改页面上展示的列表数据
      changeList(key){
        this.$store.commit('changeViewKey',key)
      }
    },
    computed:{
      ...mapState(['inputValue','viewKey']),
      ...mapGetters(['unfinishedLength','infoList'])
    }
  }
</script>

<style scoped>
  #app {
    padding: 10px;
  }

  .my_ipt {
    width: 500px;
    margin-right: 10px;
  }

  .dt_list {
    width: 500px;
    margin-top: 10px;
  }

  .footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
</style>